JPH0351640Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling primary air in gas burners for cooking and other gas burners.

Conventionally, in this type of gas combustor, the gas passage leading to the gas burner has an on-off valve or other opening/closing control member that opens and closes the gas passage, and a throttle valve or other opening/closing control member that increases or decreases the gas amount between the maximum flow rate and the minimum flow rate. A type that is equipped with a flow rate control member, and adjusts the amount of gas by the flow rate control member while the opening/closing control valve is opened to guide gas to the burner and ignite and burn it. This is known, and in this type, the gas nozzle usually sucks in primary air according to the amount of gas ejected, so even if the gas amount is changed, the amount of gas and the amount of primary air are balanced and supplied to the gas burner. However, if the flow rate control member is suddenly operated from large to small gas amount while the burner is in operation, the air flow will not suddenly decelerate even if the gas amount suddenly decreases, so the ratio of the primary air to the gas will become too large. According to this, there is a problem that misfires are likely to occur in the burners. In addition, if there is no way to stop the gas stove at the low flame position, if you operate the knob to quickly reduce the flame to a low flame, it is easy to turn the knob too much and turn it to the extinguishing position, so be careful not to turn it to the extinguishing position. Although the above-mentioned problems are unlikely to occur because the knobs must be operated with care, the knobs must be turned carefully, which is inconvenient.

The purpose of the present invention is to obtain a device free of such inconveniences, and the gas nozzle 2d is placed facing the gas intake port 1a of the gas burner 1, and the primary air is supplied from the primary air port by the gas jetting force from the gas nozzle 2d. A gas passage 2 connected to a burner 1 that sucks gas is equipped with an opening/closing control member 3 that opens and closes the gas passage 2, and a flow rate control member 4 that increases and decreases the gas amount between the maximum flow rate and the minimum flow rate. and the flow rate control member 4 is connected to the primary air supply port 5 of the burner 1.
The primary air flow rate control member 6 is provided to reduce the primary air amount only when the gas amount is reduced to the minimum flow rate.

In the illustrated example, as clearly shown in FIGS. 1 and 2, the opening/closing control member 3 is operated by pressing a push-button type first operating member 8 that controls the operation of a switch 7a interposed in the operating circuit of the igniter 7. According to the above, the flow rate control member 4 is composed of an on-off control valve that is pushed to open by being pushed by this, and the flow rate control member 4 is composed of a flow rate control valve that is pushed by and opened by the tilting of a lever-type second operating member 9. did. To explain further, the flow rate control valve 4 is
Large flow passage 10a and medium flow passage 10b parallel to each other
It is configured to control the opening and closing of the small flow passage 10c, and is composed of a large flow control valve 4a that opens and closes the large flow passage 10a, and a medium flow control valve 4b that opens and closes the medium flow passage 10b. When the second operating member 9 is tilted from right to left in the drawing, both valves 4a and 4b are closed at this right end position, and the third passage 10 is closed.
A small gas flow state is obtained in which only c is activated, but at an intermediate position, the second control valve 4b is pushed open and the third passage 10c and the second passage 1 are opened.
0b are both activated at a medium flow rate state, and furthermore, at the left end position, the first control valve 4a is also pushed open by this, and the third passage 10c, the second passage 10b, and the first control valve 4a are opened. The passage 10a is made to operate at a large flow rate state of gas.

As clearly shown in FIGS. 1 to 3, the air flow control member 6 consists of a rotatable damper in front of the supply port 5, and has a through hole in the upper part of the operating arm 11 extending from the second operating member 9. 12, and when the member 9 is tilted, it rotates accordingly. Its operating state is, for example, as shown in FIGS. 4 to 6. That is, when the second operating member 9 is tilted from left to right to change the gas amount from a large flow rate to a small flow rate, the damper 6 By rotating from the state shown in FIG. 4 through the state shown in FIG. 6 to the state shown in FIG. 5, the amount of air introduced to the primary air supply port 5 is reduced from a large flow rate to a small flow rate. To explain further,
The damper 6 has a pair of left and right through holes 6a, 6a, and a pair of left and right openings 5 connected to the supply port 5 on the back side thereof.
a, 5a, and can be switched, for example, between an open side as shown in the fourth figure and a closed side as shown in the fifth figure.

To explain its operation, consider a case where the second operating member 9 is rapidly operated from left to right while the gas burner 1 is in operation to rapidly change the gas amount from a large flow rate to a minimum flow rate. In this case, the air flow rate control member 6 is operated in conjunction with this, for example, from the open side state shown in Figure 4 to the closed side state shown in Figure 5, and the primary air amount is reduced to the reduced side, and thus only the gas amount is suddenly reduced. Inadvertent misfires that are likely to occur in the reduced type are prevented. Next, if the gas amount is increased at the minimum flow rate, the air amount will also be increased at the minimum flow rate, and no inconvenience will occur in combustion.

In this way, according to the present invention, the flow rate control member 4
When the gas amount suddenly changes from a large flow rate to a minimum flow rate due to the operation, the air flow rate control member 6 correspondingly operates to the closing side to prevent air from continuing to enter in a large amount due to inertia, Compared to the gas generated when the gas amount is suddenly changed from a large flow rate to a minimum flow rate, this method has the effect of preventing a misfire due to an excessive supply of primary air air.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of one example of the device of the present invention, Fig. 2 is a perspective view thereof, Fig. 3 is a plan view of the main parts thereof, and Fig. 4
Figures 6 through 6 are diagrams explaining the operation. DESCRIPTION OF SYMBOLS 1... Gas burner, 2... Gas passage, 3... Opening/closing control member, 4... Flow rate control member, 5... Primary air supply port, 6... Air flow rate control member. p

Claims (1)

[Scope of utility model registration request] Gas nozzle 2 is installed in the gas intake port 1a of the gas burner 1.
A gas passage 2 connected to a burner 1 which faces the gas nozzle 2d and sucks primary air from a primary air port using the gas ejection force from a gas nozzle 2d is provided with an opening/closing control member 3 for opening and closing the gas passage 2, and for adjusting the gas amount to a maximum flow rate and a minimum. In the burner 1, primary air is supplied to the primary air supply port 5 of the burner 1 only when the flow rate control member 4 reduces the gas amount to the minimum flow rate. A primary air control device in a gas combustor, comprising an air flow control member 6 that reduces the amount of air.